Garrison City HVAC-R is a family-owned and locally operated mechanical contractor proudly serving homeowners and businesses across Dover. We understand that when your heating or cooling system fails, you need fast, dependable help. That's why we prioritize rapid response times and honest, upfront communication on every job.Our team brings years of hands-on experience to every repair, installation, and maintenance call. We are fully licensed and insured, giving you peace of mind that your property is in capable hands. Whether it's a broken furnace on the coldest night of the year or a routine AC tune-up, we treat every customer like family.We believe in doing the job right the first time. No...
Photos
Our Services
Heating System Installation & Repair
<p>Keeping your home or business warm during the cold months is essential. We specialize in the sales, service, and installation of all types of heating systems. Whether you need a new furnace, boiler repair, or routine maintenance on your oil or gas burner, our technicians have you covered.</p><p>We work with oil burners, gas burners, electric heating systems, boilers, furnaces, and radiant heating setups. If your system is outdated or inefficient, we can help you upgrade to a...
<p>Keeping your home or business warm during the cold months is essential. We specialize in the sales, service, and installation of all types of heating systems. Whether you need a new furnace, boiler repair, or routine maintenance on your oil or gas burner, our technicians have you covered.</p><p>We work with oil burners, gas burners, electric heating systems, boilers, furnaces, and radiant heating setups. If your system is outdated or inefficient, we can help you upgrade to a more energy-efficient model that saves money over time. For emergency breakdowns, we offer rapid-response service to restore heat quickly.</p><p>Our process begins with a thorough inspection of your existing equipment. We identify any safety concerns, efficiency issues, or repair needs. Then, we provide a clear estimate before any work begins. Once approved, our team completes the repair or installation with minimal disruption to your daily routine. We also offer preventative maintenance plans to keep your heating system running smoothly for years.</p><p>Residents and businesses in Dover trust Garrison City HVAC-R because we show up on time, communicate clearly, and stand behind our work. From gas piping to thermostat upgrades, we handle every detail with care and expertise.</p>
Air Conditioning & Cooling Services
<p>When summer heat arrives, a reliable air conditioning system is a must. Garrison City HVAC-R provides complete cooling solutions for residential and commercial customers across Dover. We install, repair, and maintain central AC systems, ductless mini-splits, heat pumps, and rooftop units.</p><p>Our technicians are trained to diagnose problems quickly — from refrigerant leaks and frozen coils to faulty compressors and electrical issues. If your AC is blowing warm air, making...
<p>When summer heat arrives, a reliable air conditioning system is a must. Garrison City HVAC-R provides complete cooling solutions for residential and commercial customers across Dover. We install, repair, and maintain central AC systems, ductless mini-splits, heat pumps, and rooftop units.</p><p>Our technicians are trained to diagnose problems quickly — from refrigerant leaks and frozen coils to faulty compressors and electrical issues. If your AC is blowing warm air, making strange noises, or not turning on at all, we can help. We also offer system replacements for older units that are costly to operate or frequently break down.</p><p>For homes without existing ductwork, ductless mini-splits are an excellent choice. They are energy-efficient, easy to install, and provide zoned cooling exactly where you need it. We also service air handlers, thermostats, and wifi controls so you can manage comfort from anywhere.</p><p>Preventative maintenance is key to extending the life of your AC. Our seasonal tune-ups include cleaning coils, checking refrigerant levels, testing electrical components, and optimizing efficiency. Businesses rely on us to keep their spaces comfortable for employees and customers, especially in restaurants, retail stores, and offices. When you choose us, you get fast, professional service with no surprises on your bill.</p>
Refrigeration & Commercial Equipment Service
<p>For businesses that depend on refrigeration, a breakdown can mean lost product and lost revenue. Garrison City HVAC-R offers specialized refrigeration services for coolers, freezers, ice makers, glycol systems, and walk-in units. We serve restaurants, grocery stores, convenience stores, and other commercial clients throughout Dover.</p><p>Our team understands the urgency of refrigeration failures. We offer emergency service to get your equipment back online as quickly as pos...
<p>For businesses that depend on refrigeration, a breakdown can mean lost product and lost revenue. Garrison City HVAC-R offers specialized refrigeration services for coolers, freezers, ice makers, glycol systems, and walk-in units. We serve restaurants, grocery stores, convenience stores, and other commercial clients throughout Dover.</p><p>Our team understands the urgency of refrigeration failures. We offer emergency service to get your equipment back online as quickly as possible. Whether it's a condenser fan motor failure, a refrigerant leak, or a defrost timer issue, we have the diagnostic tools and parts to make the repair on the spot in most cases.</p><p>In addition to repairs, we install new refrigeration equipment and help with removal and disposal of old units. We also provide regular maintenance contracts to prevent unexpected failures. A well-maintained system runs more efficiently, uses less energy, and has a longer lifespan.</p><p>We work with ice makers for bars and restaurants, glycol systems for beer lines, and both reach-in and walk-in coolers and freezers. If you don't see your equipment listed, just call us — chances are we can service it. Commercial customers choose us because we minimize downtime and keep their operations running smoothly.</p>
Indoor Air Quality & Ventilation
<p>The air inside your home or business affects health, comfort, and productivity. Garrison City HVAC-R offers a range of indoor air quality solutions designed to reduce pollutants, control humidity, and improve ventilation. We serve residents and commercial clients in Dover who want cleaner, healthier air.</p><p>Our services include installing high-efficiency air filters, humidifiers, dehumidifiers, HRV/ERV systems, and UV air purifiers. If your space feels stuffy, has persist...
<p>The air inside your home or business affects health, comfort, and productivity. Garrison City HVAC-R offers a range of indoor air quality solutions designed to reduce pollutants, control humidity, and improve ventilation. We serve residents and commercial clients in Dover who want cleaner, healthier air.</p><p>Our services include installing high-efficiency air filters, humidifiers, dehumidifiers, HRV/ERV systems, and UV air purifiers. If your space feels stuffy, has persistent odors, or family members suffer from allergies, we can assess your needs and recommend the right equipment.</p><p>We also test and upgrade ventilation systems to ensure proper airflow and compliance with building codes. Poor ventilation can lead to mold growth, high energy bills, and uncomfortable temperature imbalances. Our solutions are designed to work seamlessly with your existing heating and cooling system.</p><p>Preventative maintenance is available for all IAQ equipment. We clean filters, inspect components, and verify that systems are operating as intended. With our help, you can breathe easier knowing your indoor environment is optimized for health and comfort. Trust Garrison City HVAC-R to improve the air you breathe every day.</p>
“We have had John service our heating system several times over the last couple of years and 2 of our past residences. He is very professional, knowledgeable, and takes the time to explain the details of the work. Most recently we had some strange behavior from the furnace directly after the service, John quickly came out that same day and resolved the issues. I would recommend GCHVACR to anyone with heating and cooling needs.
Positive
Responsiveness, Punctuality, Quality, Professionalism, Value
Services
HVAC system maintenance”
— Mike Langlais
“John is the best there is. He is prompt, attentive, and gets the job done right. He keeps my heater going and replaced my water heater when it died. If you are looking for someone that will do the job right and also treat you fairly then look no further the Garrison City HVAC. Thanks so much for everything John!!!!”
— Chris Ballard
“John came out and got my outside condenser working in no time! Making an appointment using their online website was quick & easy. Any future issues, I will be sure to have him back and am happy to support a local business! Thanks again, John!
-Ash”
— Ashlin Blightwhisper
“UPDATE: 2/10/2026: Just as good the second time around: I can’t recommend John at Garrison City HVAC enough. I just finished a massive emergency project—a new hybrid hot water heater and a full heat pump furnace/AC system—and John was a total rockstar throughout the whole process. I told him what I was trying to accomplish, and he came back with great ideas I hadn't thought of. He’s super knowledgeable and helped me land on the best setup for the house. We had to make a few adjustments on the fly, and John didn’t miss a beat. He was great with the changes and pivoted without any hassle. John removed all the old equipment and the new install looks amazing. The work is clean, organized, and clearly done by someone who takes pride in what they do. If you want an HVAC guy who is honest, fast, and knows his stuff inside and out, John is the one to call. My house is comfortable, the equipment is top-notch, and the whole experience was stress-free.
10/1/2024: Living in a two-story home was a constant temperature battle! We were either shivering downstairs or baking in the upstairs bedrooms. I called Garrison City HVAC and I'm so glad I did! John, the owner, came out himself and took the time to understand the problem. The installation was smooth and professional. John was respectful of my home, cleaned up, and took the time to ensure the new thermostats and sensors worked across all of the systems and apps. Now, I can finally set different temperatures for upstairs and downstairs - total game changer!”
— Matthew Cedrone
“John (owner) and Garrison City HVAC were fantastic, from the receptionist to the actual install. John installed a new water heater for me on a couple days notice. He was knowledgeable, polished, professional and friendly. The new water heater works great and the work space was spotlessly clean after the job. I will absolutely use Garrison City HVAC each and every time I need something serviced or replaced. If you are in need of any HVAC services this is the company you want to use without question.”
— Ryan McNally
“John was prompt, professional, pleasant and any other superlatives that start with p. We were lucky enough to call John just as he was leaving a no-show call. The central heat at our daycare center had shut off and John was able to help on short notice. He was able to replace several filters and ignition parts. He's done work for us before and we wouldn't think to call anyone else. Great job once again.”
— Ashley Hannon
Write a Review
✓ Thank you! Your review has been submitted.
Contact air conditioning installation Dover
Fill in the form below and we'll get back to you as soon as possible.
Tell us who you are so we can verify your connection to air conditioning installation Dover.
About air conditioning installation Dover
Garrison City HVAC-R is a family-owned and locally operated mechanical contractor proudly serving homeowners and businesses across Dover. We understand that when your heating or cooling system fails, you need fast, dependable help. That's why we prioritize rapid response times and honest, upfront communication on every job.Our team brings years of hands-on experience to every repair, installation, and maintenance call. We are fully licensed and insured, giving you peace of mind that your property is in capable hands. Whether it's a broken furnace on the coldest night of the year or a routine AC tune-up, we treat every customer like family.We believe in doing the job right the first time. No shortcuts, no hidden fees — just quality workmanship and lasting solutions. From residential comfort systems to commercial refrigeration, we have the skills and equipment to handle any challenge. Call us today and experience the Garrison City difference for yourself.
